Thom didn't mention the 60 minute statement in his earlier reply so it must have been removed between'72 and '74.
Russell Rewis Brown Automatic Sprinklers, Inc. 107C Hemlock Street Valdosta, Georgia 31601 229-244-8130 [email protected] 1972 - 5272 - 30 minutes except for low differential systems where the time can be 60 minutes. Greg McGahan In NFPA 13, 1974 5-2.7.2 my earliest edition, has the 30 min. requirement, so if you want the reason they wrote it this way, you'll need to explore the committee ROP and ROC for earlier editions. Thom _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
